Mechanical movement.



No. 818,601. PATENTED FEB. 27, 1906. L. R. TULLOCH. MECHANICAL MOVEMENT.

APPLICATION FILED MARJI, 1904.

UNITED STATES PATENT OFFICE.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed March 11, 1904. Serial No. 197,723.

To ctZl whom it may concern.-

Be it known that I, LoUIs R. TULLooH, a citizen of the United States, residing at Angels Camp, in the county of Calaveras and State of California, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

My invention relates to improvements in mechanical movements, the object of my invention being to provide a mechanical movement by means of which an intermittent progressive movement may be obtained from an oscillating movement.

My present invention is similar in many respects to that disclosed in the United States Patent granted to me November 10, 1903, No. 743,596, both as to its general object and mode of operation. The features there disclosed, which are equally applicable to the present invention, will therefore be omitted herein, the present disclosure being confined to the novel features of construction wherein my present invention differs from that there shown.

In the accompanying drawings, Figure 1 is a side elevation of a portion of the apparatus. Fig. 2 is a perspective view of an arm and grip. Fig. 3 is a broken horizontal section of the apparatus. Fig. 4 is a similar view of a modification. Fig. 5 is a broken side view of the modification. Fig. 6 is a perspective view of an arm and a grip of a further modification.

Referring to the drawings, 1 represents a belt which travels around a roller 2 upon a shaft 3. Upon said shaft 3 is fixedly secured by a set-screw 4 a collar 5, having arms 6, connected at their ends to a ring 7. Within said ring work friction-grips 8, as hereinafter explained. The shaft 3 is continued through said ring, and upon the end thereof is loosely mounted a sleeve 9, upon which is fixedly secured by a set-screw 10 a collar 11, having a crank arm 12, adjustably connected, as shown at 13, with a reciprocating pitman 14, operated from any suitable source of power. This pitman imparts a rocking motion to the crank 12 and also to the sleeve 9. The inner end of said sleeve 9 is attached to or formed integral with a plate 1 7, having formed thereon diametrically opposite segment-gears 18. These gears rock loosely with the sleeve 9 within the ring 7. The rocking motion of said segment-gears is communicated to said ring 7 by means of grips 8, each consisting of a shoe 19, secured to a grip-plate 20. Mounted in bearings 21 on each grip-plate are the trunnions of the nut 22. In said nut works a screw 23, formed on a stem 24, the inner end of which is revolubly mounted in an arm 25. The inner ends of these arms are pivoted, as shown at 26, in forked extensions 27 from the sleeve 9.

In the modification shown in Figs. 4 and 5 the lower ends of the stems 24 rest in elongated recesses 28, formed in the ends of extensions 29 (not forked in this case) from the sleeve 9. The lateral width (or that in the direction parallel with the main shaft 3) of these recesses is the same as that of the stems 24 but their circumferential width is greater, permitting the stems to rock in said recesses up and down or in a plane parallel with that of the segment-plane. In the first modification a pin 30, engaging a groove 31, formed in the stem, prevents radial movement of said stem. In both cases the stems are directed to a point below the center of the shaft 3. Therefore the rocking of the sleeve 9 in one direction has a tendency to move said stems in and out, one stem always moving inward, while the other moves outward. Upon said stems 24 are revolubly carried pinions 32, which engage the teeth of the segment-gears 18, and said pinions have extensions 33, which contact with lugs 34, formed upon the stems 24, and impart rotation thereto. It will readily be seen that rotation imparted to either of said screws in one direction will by screwing the screw into the nut 22 withdraw the shoe from the inner surface of the ring and permit said shoe to move freely within said inner surface, while by turning the screw in the other direction the nut will move outwardly from said screw, thus forcing the surface of the shoe against the inner surface of the ring and causing it to firmly grip the same. The shoe is thus made to grip the ring from two causesfirst, the outward motion of the arm as a whole, due to the rotation of the sleeve, and, secondly, on account of the turning of the screw, thus causing the nuts to move outwardly.

In the modification shown in Fig. 6 the pinions 32 are on the stems 24, which rotate with the pinions. Springs 36 operate against the pinion-stems 24 to force them always against the clamping side or direction of the frictionwheel, causing the pinions and screws to, revolve and forcing the shoes against the friction-surface of the friction-wheel in order to is in its lowest position and is raised rearwardly, the effect is, first, by means of the sleeve 9, to move the rear arm 24 rearwardly away from the center of the shaft, thus causing the shoe 19 to come closer to the inner surface of the ring. Next, the rear segmentgear will ascend with the crank and in its ascent will cause the pinion-gearing to rotate, and by the extension from the pinion striking the lug upon the screw-stem the rotation of the pinion will be imparted to the screw-stem, and since the screw is revolved in a lefthanded direction this will have the effect of drawing the screw out of the nut, or, in other words, forcing the nut out upon the screw, and pressing the shoe of the grip against the surface of the ring. This will cause said shoe to grip said ring with great pressure and will immediately clamp the same, so that the ring will be carried upward with the segmentgear, and a movement in a forward direction will be imparted to the belt. As soon as the crank-arm stops and begins to return the sleeve 9 begins to return. It then immediately imparts a right-handed rotary movement to the pinion, which causes the screw to screw into the nut or the nut to be drawn on to the screw, thus withdrawing the shoe from its pressure upon the inner surface of the ring and allowing the arm to drop freely by gravity and under the action of the spring 36, so that the backward movement of the crankarm is not accompanied by abackward movement of the belt. In like manner the up ward and rearward movement of the front segment-gear will cause the corresponding shoe to engage the ring and move it back ward, while upon its return movement the shoe will be released from the ring, so that no corresponding forward movement of the belt will take place.

Since the operative movement of each segment-gear is its movement in an upward direction and since when the rear segment-gear ismoving upward the front end is moving downward, and vice versa, it follows that these opposing movements cannot act simultaneously, but they must necessarily act alternately. When both arms are operating,

the belt will move forward and backward alternately.

Devices similar to those disclosed in my patent above referred to may be used to variably limit the extent of movement of either arm.

I claim 1. In a mechanical movement, the combination of a shaft, afriction-ring secured thereon, a sleeve mounted loosely on said shaft, an extension therefrom, an arm having its inner end engaged by the outer end of said extension, said arm rockin about said outer end, a friction-shoe carried y the outer end of said arm, and arranged to engage said frictionring, and means for rocking said sleeve to bring said shoe into and out of engagement with the friction-ring, substantially as described.

2. In a mechanical movement, the combination of ashaft, afriction-ring secured thereon, a sleeve loose on said shaft, extensions from said sleeve, arms havin their inner ends engaged by the outer ends of said extensions,

3. In a mechanical movement, the combination (if a shaft, a friction-ring secured thereon, a sleeve loosely mounted on said shaft, means for rocking said sleeve, segment-gears carried by said sleeve, extensions from said sleeve, arms having their inner ends engaged by the outer ends of said extensions, said arms rocking about said outer ends, stems rotatably carried by the outer ends of said arms, and threaded at their outer ends, pinions on said stems engaging said gears, nuts engaged by said threaded ends, and friction-shoes to which said nuts are pivotally attached said friction-shoes engaging said ring, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LOUIS R. TULLOCH. Witnesses:

FRANors M. WRIGHT, BEssIE GORFINKEL. 

